Squaric Acid

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Properties Simple | Detailed

Formula C4H2O4
IUPAC Name 3,4-dihydroxycyclobut-3-ene-1,2-dione
Molecular Mass 114.056 g·mol−1
Heat of Formation -353.4 ± 16.7 kJ·mol−1
Dipole Moment 3.70 ± 1.08 D
Volume 117.09 Å 3
Surface Area 130.34 Å 2
HOMO Energy -9.68 ± 0.55 eV
LUMO Energy 2.09 ± eV
Point Group Symmetry Cs
Synonyms
  • 1,2-dihydroxycyclobutene-3,4-dione
  • 1,2-diketo-3,4-dihydroxycyclobutene
  • 3,4-dihydroxy-3-cyclobutene-1,2-dione
  • 3,4-dihydroxy-cyclobutene-1,2-dione
  • 3,4-dihydroxycyclobut-3-ene-1,2-quinone
  • 3-cyclobutene-1,2-dione, 3,4-dihydroxy-
  • cyclobutene-1,2-dione, 3,4-dihydroxy-
  • cyclobutenedione, dihydroxy-
  • cyclobutenedione, dihydroxy- (8ci)
  • dihydroxycyclobutenedione
  • fr-0532
  • quadratic acid
CAS Number(s)
  • 2892-51-5
  • 94592-78-6
InChIKey PWEBUXCTKOWPCW-UHFFFAOYSA-N
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